of flint



Y 13,1931. R Q HELGEBY 1,788,872

JEWEL PLATE FOR SPEEDOMETERS Filed May 12 1928 Patented Jan. 13, 1931' UNITED, STATES EIPATEILNTRFQFFICE RALPH 0. HELGEBY, or FLINT, MICHIGAN; 1 7

OF FLINT, MICHIGAN, A coMPANY or :MIGHIGAN assrenonfroxaoisranx PYLQUG EWEL PLATE m srmnemmns Application-filed May 12, 1928. Serial imiamaee. 1

- This invention relates to measuring .ini struments and has been designed more par ticularly as an improvement-in aspeedometer for motor vehicles. f Among the objects sought to be obtained by the improvements herein described are simplicity in construction and economy in manufacture. The design, because of its simplicity and economy, 'is particularly i i from. a reading of the followingspecification adapted for a. large scale production. Other objects and advantages will .be; {apparent and an examination of the j-accompanying drawing. H

In the drawing Figure 1 isa plan view, Figure 2 is a section on line 2 2 ure 1; and

Figure 3 illustrates in V erspective a detail. Referring by reference characters to" the drawing, numeral represents aflat stamping; It is secured. to frame 12 by means of ing, not illustrated. The frame carries a screws or "other fastening means 14. The

frame designated by numeral 12 is that part of the speedometer which'is to "carry the movable parts'of the speedometer and the odometer. It is tobe enclosed within a casrotor shaft 3 provided with a gear element 1 for driving the odometer mechanism.

The speedometer indicating member is designated by numeral 5. It is preferab1y,as-

7 shown in the drawing, of cup shape andit with stamping 10 is an arm 18 which'isfbent surrounds a rotor 7 suitably secured to the rotating rotor shaft 3. The speed indicating cup 5 is carried by a spindle'having lower end and side bearings within the upper end of the rotor shaft, as is commonly done and as is illustrated in Figure 2. j I

The flat stamping 10 may be reinforced by a rib 16, as shown in Figure'l. Integral down from the plane of the stamping, as

best shown in Figure 2. This arm is to serve as a stop and is engaged part 20 carriedby the rotating indicating 5 cup to" limit the swinging movement of said indicating cup under the influence of spring .38.

The s rin 38 is at one end secured to the r i p b 'tioned that the magnet for use with such an spindle, as shown in the drawing.

f F s-i e about the part28 ofplate 10 that an opening in arm 32 fits to permit rotation of said arm.

the plate 10. The notches 34 and slot 36 afford a very economical and effective ar The platelO alsohas 24lanced out therefrom and bentintofU-shape. The up- 7 per arm of the U overliesthe spindle 26 of the speed indicating cup and serves as a retainer also. an. inexpensive stamped plate. It is preferably formed with a radially and somewhat upwardly extending arm 32; It is This regulator plate is formed with two lanced out notches 34 and 34 of which one,

34, is bent over the margin of plate 10 and the other, 34 passes through an arc-shaped slot 36 in plate 10 and is also bent over and'pinched against thesaid plate 10. The slot 36 is of sufiicient length of-arc to provide the necessary swinging of regulator arm 32 to adjust the hail-spring. The-outer end of arm 32 is cut and shaped, as best shown in Figure 3 at 42, and received between the'depremed portions thereof is the end of hair spring 38 and a tapered securing pin 40.

By the provision above described, it will be seen that the one-piece stamping 10 carries integral therewith the speed cup stop 18, the spindle retainer 24 and the hole jewel seat. This reduceslthe number of parts and thereby saves expense both in material and the cost of assembly. The speed cup stop 18 is easily accessible and may be readily bent for the purpose of adjustment to get an accurate zero reading. 7 p The use of rib 16 sufiiciently reinforces rangement for mounting the hair spring regulator.

Although not'shown, it should be men- COMPANY, p

instrument is suitably supported on ledges 25 formed on the frame 12.

I claim:

In a measuring instrument having as parts thereof an indicating member, a spindle therefor, yielding means biasing said indieatingmember to a zero position, a stamped plate, a spring regulator rotatably mounted on said plate, said plate having a slot cut on an are about the center of rotation of said spring regulator, said regulator having parts lanced therefrom and bent over adjacent portions of said frame, one ofsaid parts being passed through said slot.

In testimony whereof I affi'x'm'y signature.

RALPH ,O.}IELGEBY. 

